Autistic Traits are Associated with Less Precise Perceptual Integration of Face Identity.

Turbett et al. (2022) asked adults to look at pairs of faces.

Some faces looked alike, some did not.

People with more autistic traits blended the different faces together more than other people.

The team used a quick computer task to measure this blending, called serial dependence.

Adults with higher autistic traits showed the same overall blending as everyone else.

But they mixed together faces that were less alike.

This means their brain casts a wider net when it links one face to the next.

The result hints at a measurable, perceptual quirk tied to autism traits.

Hartston et al. (2023) extends the finding. They tested adults who actually have an autism diagnosis and saw weaker face recognition and smaller face-inversion effects.

Together the two papers paint the same picture: autism, whether full diagnosis or just traits, brings less sharp face perception.

Van der Donck et al. (2023) seems to disagree. They recorded brain waves and found no group difference in fast neural responses to face identity or expression.

The clash is only skin-deep. Stephanie et al. looked at early brain spikes, while Kaitlyn et al. looked at later behavioral bias. Adults may compensate neurally yet still show wider blending when they report what they saw.

If you assess social skills, know that face-matching errors may stem from perceptual noise, not inattention. When teaching face recognition, give extra exemplars and highlight unique features to tighten the learner’s visual category.